Which of the following alcohols is $NOT$ prepared by acid catalyzed hydration of alkenes?

$3-$methylpentan$-3-$ol will be prepared from

The product of the following reaction is ...............
$(CH_3)_3C-CH=CH_2 \xrightarrow[(ii) \, NaBH_4 + NaOH]{(i) \, Hg(CH_3COO)_2; \, THF} ?$

The oxymercuration-demercuration of allylbenzene $(C_6H_5-CH_2-CH=CH_2)$ produces the major product:

What are $X$ and $Y$ in the following reactions?
$CH_2O \xrightarrow[(ii) H_3O^+]{(i) X} CH_3(CH_2)_2CH_2OH$
$Y \xrightarrow[(ii) H_3O^+]{(i) C_2H_5MgBr} CH_3CH_2C(CH_3)_2OH$

Give the structures and $IUPAC$ names of the products expected from the following reactions:
$(a)$ Catalytic reduction of butanal.
$(b)$ Hydration of propene in the presence of dilute sulphuric acid.
$(c)$ Reaction of propanone with methylmagnesium bromide followed by hydrolysis.